<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>vuejs如何根据下标修改数组中的值</title>
</head>

<body>

</body>
<script>
  "use strict"; {
    // this.$set(arr, index, value)
  };
</script>

</html>